New QS138 90H V3 4KW7200rpm with 1:2.35 gear boxMid Drive MotorKits with ND72680 Controller 350A 680A Line Communication for Go Kart

NOTE:
1.Orders do not include customs duties, which are borne by the buyer.(Except for some aliexpress marked orders including tax).
2.For some special countries with strict customs for import, so pls. confirm it firstly to us that you have ability to do customs clearance, otherwise we will not take on heavy responsibilities for this issue, return money and goods are not support. (special countries list contact seller) 

For138 4000W V3 motor powertrain kits,it could be used for electricmotorcycle, which could be 72V120KPH.

e.g. E-Motorcycle

E-motorcycle weight, approx 180kg+1*70kg

Speed: peak 120km/h

Gear ratio: 1:2.46

Climbing slope: 20°@30kph@250kg

Tire: 100/70-19

P.S. If you have any confused about the shipping cost, please feel free to contact with us.

Also could place order but don't pay first, then we could adjust the price. 

One set including below kits:

1. 1pcs X QS138 4000W V3 1:2.35 gear ratio Mid Drive Motorwith 15T sprocket

2. 1pcs X ND72680 Controller with USB cable

3. 1pcs X DKD Speedometer

4. 1pcs X DNR switch

5. 1pcs X Foot pedal

Key Features

1). Simplify to make a electric-motorcycle. Gearbox, transmission shaft, clutch are no need. which save space.

2). It could be installed in the rear to save more space for battery.

3). Support regenerative braking

4). High efficiency: 85~90% 

Product Description

1. QS138 4kw V3 Mid Drive Motor

Spec

Drawing

Test Report

138 4kw V3+ND72680(gear ratio 2.368X2.46)

2. ND72680 Controller

Spec

Drawing

Harness definition

Debug Cable

Software Display(PC)

3. DKD Speedometer

Key Features

Both CAN and LIN communication are supported

Product Description

DKD LCD speedometer, Adjustable

It display D N R, P, 1 2 3 S gear, and battery current X10.

For the speed, we recommend to set it as following as default (to match with QS138 3kw 12inch assembly).

·Wheel tire size: 130/70-12

·Pole Pairs: 5

·Gear Ratio: 1: 4.77

·Voltage: 72V (20s Lithium battery)

4. DNR

5. Foot pedal

Application